Keep header with first line of next block - xslt

Question

At the end of the page, I dont want to have the label of 'examClin' isolated. So if ever, the label arrives at the end of the page, I need ONE and no more than one line of examClin to be attached with the #label of examClin... Or both elements should go to next page.
Am i clear enough?
different elements... we arrive at the end of the page
<fo:table-row>
<fo:table-cell number-columns-spanned="5">
<fo:block space-before="2mm">
<xsl:value-of select="./examClin/#label"/>: </fo:inline>
</fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell number-columns-spanned="5" padding-top="2mm" padding-bottom="2mm"
padding-left="1mm" padding-right="1mm">
<fo:block white-space-collapse="false" font-style="italic" >
<xsl:value-of select="./examClin/child::text()"/>
</fo:block>
</fo:table-cell>
</fo:table-row>

Answer 1

Put them into a single block (that means you must merge the two table rows into one) and use keep-together.

Answer 2

Thank you Aaron. But then I am afraid that if is a very long text, everything will keep together and not just the first line. As a result, it can leave a long white block on previous page.
I created the following template: the idea is to find what the first line will be: either the 75 first characters but if we find a return carriage before the 75 first characters, we will take the string before the first return carriage.
<xsl:template name="elem3">
<xsl:choose>
<xsl:when test="child::text()">
<xsl:variable name="test0" select="substring(child::text(),1,100000)"/>
<xsl:variable name="test1" select="substring(child::text(),0,75)"/>
<xsl:variable name="test2" select="substring(child::text(),75,100000)"/>
<xsl:variable name="test3" select="substring-before($test2,' ')"/>
<xsl:variable name="test4" select="concat($test1,$test3)"/>
<xsl:variable name="test5" select="substring-after($test2,' ')"/>
<xsl:variable name="test6" select="substring-before($test1,'
')"/>
<xsl:variable name="test7" select="substring-after($test0,'
')"/>
<fo:table-row>
<fo:table-cell number-columns-spanned="5">
<fo:block space-before="2mm">
<fo:inline font-weight="bold"><xsl:value-of select="#label"/>: </fo:inline>
</fo:block>
</fo:table-cell>
</fo:table-row>
<xsl:choose>
<xsl:when test="child::text()">
<fo:table-row keep-with-previous="always">
<fo:table-cell number-columns-spanned="6" padding-top="2mm" padding-left="1mm" padding-right="1mm">
<fo:block white-space-collapse="false" font-style="italic" >
<xsl:choose>
<xsl:when test="contains($test1,'
')"> <xsl:value-of select="$test6"/></xsl:when>
<xsl:otherwise><xsl:value-of select="$test4"/></xsl:otherwise>
</xsl:choose>
</fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell number-columns-spanned="5" padding-left="1mm" padding-right="1mm">
<fo:block white-space-collapse="false" font-style="italic" >
<xsl:choose>
<xsl:when test="contains($test1,'
')"><xsl:value-of select="$test7"/></xsl:when>
<xsl:otherwise> <xsl:value-of select="$test5"/></xsl:otherwise>
</xsl:choose>
</fo:block>
</fo:table-cell>
</fo:table-row>
</xsl:when>
</xsl:choose>
</xsl:when>
</xsl:choose>
</xsl:template>